package com.dunshan;

/**
 * @author LiWen
 * @version 1.0
 * @Date: 2021-05-04 21:25
 * @Description:
 */
public class NumberAdd {
    public String sayHello() {
        return "Hello";
    }

    public String sayHelloToPerson(String s) {
        if (s == null || "".equals(s)) {
            s = "nobody";
        }
        return (new StringBuilder()).append("Hello ").append(s).toString();
    }

    public int sum(int a, int b) {
        return a + b;
    }
}
